itext实现pdf导出

jar

iText-2.1.4.jar
iTextAsian.jar 中文必备，否则不显示

程序员的一贯风格不多说，上代码：

public class OrderData2PDFServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;
    private WebApplicationContext wac;  
    public OrderData2PDFServlet() {
        super();
    }

    @Override
    public void init() throws ServletException {
        wac =WebApplicationContextUtils.getRequiredWebApplicationContext(this.getServletContext());  
    }
    /*
     * 
生成批PDF document 并支持下载
     * 
     * @author Z.J
     * 
     * @date 2016-8-2
     * 
     * @param request
     * 
     * @param response
     * 
     * @throws ServletException
     * 
     * @throws IOException
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // No.1 处理分页查询参数
        Paginator page = new Paginator();
        CommonUtils.setParametersForPage(page, request);
        int  columnCount=6;
        float[] columnRatio=new float[] { 2, 2, 1, 1, 2, 2 };
        //pdf表格导出的title
        String[] titleArr={"Paypal交易单号","客户姓名","交易日期","总金额","国家","回访次数"};
        String header="订单信息";
        OrderService orderService=(OrderService)wac.getBean("orderService");
        //获取订单信息
        List resultList =orderService.getOrderListByPage(page);
        //创建文档对象，并设置大小，本案例设为A4纸尺寸
        Document document = new Document(PageSize.A4.rotate());
        try{
            // 设置响应输出数据的字符集
            response.setContentType("application/x-msdownload;charset=UTF-8");
            // 激活浏览器文件下载框，提示用户保存
            response.setHeader("Content-Disposition", "attachment;filename=order_info.pdf");
            // open output stream
            PdfWriter.getInstance(document, response.getOutputStream());
            // open PDF document
            document.open();
            //字体处理，中文需要用到
            FontSelector selector = new FontSelector();
//设置英文显示字体TIMES_ROMAN及大小
    selector.addFont(FontFactory.getFont(FontFactory.TIMES_ROMAN, 10));
    //设置中文显示字体STSong-Light
            Font cf1 = FontFactory.getFont("STSong-Light", "UniGB-UCS2-H", BaseFont.NOT_EMBEDDED, 10);
            //设置标题显示字体STSong-Light及大小
            Font headerFont = FontFactory.getFont("STSong-Light", "UniGB-UCS2-H", BaseFont.NOT_EMBEDDED, 18);
            selector.addFont(cf1);
            //创建pdf表格并填充表格内容
            if (resultList != null && resultList.size() > 0) {
                PdfPTable table = new PdfPTable(columnRatio);
                PdfPCell topHeaderCell = new PdfPCell(new Phrase(header,headerFont));
                topHeaderCell.setColspan(columnCount);
                topHeaderCell.setMinimumHeight(35);
                topHeaderCell.setBackgroundColor(new Color(189, 215, 238));
                topHeaderCell.setHorizontalAlignment(Element.ALIGN_CENTER);
                topHeaderCell.setVerticalAlignment(Element.ALIGN_MIDDLE);
                table.addCell(topHeaderCell);

                PdfPCell defaultCell = table.getDefaultCell();
                defaultCell.setHorizontalAlignment(Element.ALIGN_CENTER);
                defaultCell.setMinimumHeight(30);
                defaultCell.setVerticalAlignment(Element.ALIGN_MIDDLE);
                PdfPTableEvent event = new AlternatingBackground();
                for (int i = 0; i < 2; i++) {
                    for(String s:titleArr){
                        table.addCell(selector.process(s));
                    }
                }
                table.setHeaderRows(3);
                table.setFooterRows(1);
                defaultCell.setMinimumHeight(25);
                for (Order o : resultList) {
                    table.addCell(selector.process(CommonUtils.processNullAndEmpty(o.getPaypalNumber())));
                    CustomerModel cu=o.getCustomer();
                    if(cu!=null&&CommonUtils.isNotNullAndEmpty(cu.getCustomerName())){
                        table.addCell(selector.process(CommonUtils.processNullAndEmpty(cu.getCustomerName())));
                    }else{
                        table.addCell(selector.process(""));

                    }

                    table.addCell(selector.process(CommonUtils.processNullAndEmpty(o.getTradeDate())));
                    table.addCell(selector.process(CommonUtils.processNullAndEmpty(o.getOrderTotal())));
                    if(cu!=null&&CommonUtils.isNotNullAndEmpty(cu.getCustomerName())){
                        Country ct=cu.getCountry();
                        if(ct!=null&&CommonUtils.isNotNullAndEmpty(ct.getCountryName())){
                            table.addCell(selector.process(ct.getCountryName()));
                        }else{
                            table.addCell(selector.process(""));
                        }
                    }else{
                        table.addCell(selector.process(""));
                    }

                    table.addCell(selector.process(CommonUtils.processNullAndEmpty(o.getCallbackTimes())));
                }
                table.setTableEvent(event);
                document.add(table);
            }else{
            Font f1 = FontFactory.getFont("STSong-Light", "UniGB-UCS2-H", BaseFont.NOT_EMBEDDED, 28);
            f1.setColor(new GrayColor(0.75f));
            PdfPTable table = new PdfPTable(1);
            table.setWidthPercentage(100);
            PdfPCell cell = new PdfPCell(new Phrase("暂无数据",f1));
            cell.setHorizontalAlignment(Element.ALIGN_CENTER);
            cell.setBorder(0);
            cell.setMinimumHeight(30);
            cell.setColspan(columnCount);
            table.addCell(cell);
            document.add(table);
            }

        }catch(Exception e){
            e.printStackTrace();
        }finally{
            document.close();
        }
    }
    /*
     * 

     * 
     * @author Z.J
     * 
     * @date 2016-8-2
     * 
     * @param request
     * 
     * @param response
     * 
     * @throws ServletException
     * 
     * @throws IOException
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        this.doGet(request, response);
    }

}

图简单的朋友们，可以直接把本代码给一下就能用，要是想深究的话，请仔细阅读itext的使用API。本案例使用FontSelector实现了中英文字体混合显示，程序会自动根据当前要显示的文字自行切换字体。
jar包和itext使用API的下载地址如下：http://download.csdn.net/detail/chrisjingu/9618083